Genetics: Module 5 Review

Front

What is a homozygous recessive genotype?

Back

A genotype consisting of two identical recessive alleles, such as 'tt'.

Front

What does the Law of Dominance state?

Back

If a dominant allele is present, the trait will always appear in the organism.

Front

What is the Law of Independent Assortment?

Back

The principle that alleles for different traits are distributed to gametes independently of one another.

Front

What do the letters on the top and side of a Punnett square represent?

Back

The possible alleles given by the parents following meiosis.

Front

What is a Punnett square used for?

Back

To predict the genotypes and phenotypes of offspring from a genetic cross.

Front

Define genotype.

Back

The genetic makeup of an organism, represented by alleles.

Front

Define phenotype.

Back

The observable physical or biochemical characteristics of an organism, determined by its genotype.

Front

What is a dominant allele?

Back

An allele that expresses its trait even in the presence of a recessive allele.

Front

What is a recessive allele?

Back

An allele that only expresses its trait when two copies are present (homozygous).

Front

What is the genotypic ratio for a monohybrid cross?

Back

1 TT: 2 Tt: 1 tt.